WATER AND WASTEWATER DIVISION FOR BOILERS
Basic Boiler System Schematic:
Boilers The big picture of boiler water treatment chemicals is the control of scale, corrosion, and boiler carryover. Scale can lead to boiler inefficiency, plugged tubes, hot spots, under-deposit corrosion, and ultimately boiler damage. Corrosion can reduce the operating life of a boiler system and increase maintenance costs. Boiler carryover can lead to reduced steam quality and purity and cause turbine damage.
Typical boiler treatment chemicals are listed below.
Oxygen Scavengers: chemically neutralize oxygen not removed by the deaerator. Oxygen can lead to pitting in a boiler system.
- Sulfite/bisulfite
- Hydrazine
- DEHA (Diethylhydroxylamine)
- Carbohydrazide
- Erythorbate
Phosphates: inhibits scale formation on heat transfer surfaces.
- Orthophosphate
- Sodium tripolyphosphate
- Sodium hexametaphosphate
- TKPP (tetrapotassium pyrophosphate)
- HEDP (an organic phosphate)
Chelants:
inhibits scale formation by complexing with the
hardness ions.
- EDTA
Antifoams: surface-active chemicals that reduce foaming.
- Polyalkalene glycol
Neutralizing & Filming Amines: neutralizing amines protect condensate system by neutralizing effects of carbonic acid and filmers provide a protective coating.
- Morpholine
- Cyclohexylamine
- DEAE (Diethylethanolamine)
- Aminomethylpropanol
- Aqua ammonia
- ODA (Octadecylamine) – filming amine
Alkalinity Control: maintaining proper boiler alkalinity or pH protects the boiler from corrosion and facilitates certain types of chemical treatment programs (e.g., phosphate precipitation programs).
- Caustic (sodium hydroxide)
- Mono-, di-, and trisodium phosphate (coordinated phosphate control)
Polymers: disperse solids and inhibit scale.
- Polyacrylates
- Polymethacrylates
- Polymaleic acid
- Polyacrylate/acrylamide
- Acrylate/AMPS/sulfonated styrene terpolymer
- Acrylate/sulfonic acid/nonionic terpolymer
PRODUCTS FOR BOILERS:
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PRODUCTS FOR BOILERS:
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